Polarity Selection; High Altitude Operation - Honda EW171 Owner's Manual

Polarity Selection
The welding terminals are labeled I'+" (positive) and "-'I (negative). Changing
the polarity of the cables will affect the weld. The correct polarity selection is
dependent on the type of electrode you are using and the type of material you
are welding; refer to the electrode manufacturer's recommendations for best
results.
For straight polarity, attach the electrode cable to the negative terminal, and
attach the ground cable to the positive terminal. To change to reverse polarity,
reverse the cables.
I
STRAIGHT POLARITY
CABLE
REVERSE POLARITY
GROUND
ELECTRODE
High Altitude Operation
At high altitude, the standard carburetor air-fuel mixture will be excessively
rich. Performance will decrease, and fuel consumption will increase.
High altitude performance can be improved by installing a smaller diameter
main fuel jet in the carburetor and readjusting the pilot screw. If you always
operate the engine at altitudes higher than 6,000 feet above sea level, have
an authorized Honda generator dealer perform this carburetor modification.
Even with suitable carburetor jetting, engine horsepower will decrease
approximately 3.5% for each 1,000 foot increase in altitude. The effect of
altitude on horsepower will be greater than this if no carburetor modification
is made.
pieEEl
If a generator/welder jetted for high altitude is used at a lower
altitude the air fuel mixture will reduce performance and may overheat or
seriously damage the engine.
19